Détention brevets de la classe E21B 47/113

Brevets de cette classe: 180

Historique des publications depuis 10 ans

3
5
13
17
11
24
24
19
15
9
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20977
46
Saudi Arabian Oil Company
13428
32
Schlumberger Technology Corporation
10914
10
Aramco Services Company
4039
6
Lytt Limited
51
6
Nike, Inc.
14328
5
California Institute of Technology
3986
5
Schlumberger Canada Limited
7373
4
Hifi Engineering Inc.
131
4
Baker Hughes Oilfield Operations, LLC
2334
4
Schlumberger Technology B.v.
5189
3
Chevron U.S.A. Inc.
4004
3
ConocoPhillips Company
1683
3
Services Petroliers Schlumberger
5835
3
Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
825
2
China Petroleum & Chemical Corporation
1913
2
ExxonMobil Upstream Research Company
2390
2
Kemira Chemicals, Inc.
80
2
Kemira Oyj
1216
2
Petroleum Engineering Institute of Zyof Branch, Sinopec
3
2
Autres propriétaires 34